diff --git a/NucleicRemote/NucleicRemote/Models/HostConnection.swift b/NucleicRemote/NucleicRemote/Models/HostConnection.swift
index 0753185..8365fbd 100644
--- a/NucleicRemote/NucleicRemote/Models/HostConnection.swift
+++ b/NucleicRemote/NucleicRemote/Models/HostConnection.swift
@@ -83,6 +83,10 @@ final class HostConnection {
         /// Backfilled history for the open session (the full-transcript fetch). Merged into the
         /// transcript by seq, not appended — these events precede the tail already on screen.
         var openBackfill: (EventBatch) -> Void = { _ in }
+        /// A background transcript prefetch finished — everything it fetched (empty when the
+        /// host had nothing / the fetch died with the connection). RemoteStore merges it into
+        /// the offline cache and starts the next queued prefetch either way.
+        var transcriptPrefetched: (SessionID, [AgentEvent]) -> Void = { _, _ in }
         /// The open session's full diff arrived.
         var openDiff: (WireSessionDiff) -> Void = { _ in }
         /// An approval was requested (with the resolved session title) — post the notification and,